ConvaTec DuoDERM CGF - Control Gel Formula Wound Dressing is made of hydrocolloid material and is moisture retentive. Ideal for use with dermal ulcers, pressure ulcers (stage II - IV), leg ulcers, superficial wounds, burns and donor sites. DuoDERM CGF wound gel is easy to remove and helps to protect the wound from bacteria and external contamination. This wound gel dressing is also available with a wide outer foam border for hard-to dress areas.